Anisotropic growth of ZnO nanoparticles driven by the structure of amine surfactants: the role of surface dynamics in nanocrystal growth

Wang, Yinping; Coppel, Yannick; Lepetit, Christine; Marty, Jean‐Daniel; Mingotaud, Christophe; Kahn, Myrtil L.

doi:10.1039/d1na00566a

Cited by 6 publications

(4 citation statements)

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“…As a matter of fact, the controlled hydrolysis of dicyclohexyl zinc, Zn(Cy) 2 , in batch reactors is known to produce well‐defined crystalline ZnO NPs of <10 nm in diameter ( Scheme 1 ). [ 60 ] The fast hydrolysis of Zn(Cy) 2 solubilized in various organic solvents (THF, pentane, etc.) takes place with one equivalent of water in the presence of dodecylamine (C 12 H 27 N, DDA), [ 61 ] a suitable ligand for ZnO.…”

Section: Resultsmentioning

confidence: 99%

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Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

et al. 2022

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Application of nanocomposites in daily life requires not only small nanoparticles (NPs) well dispersed in a matrix, but also a manufacturing process that is mindful of the operator and the environment. Avoiding any exposure to NPs is one such way, and direct liquid reaction-injection (DLRI) aims to fulfill this need. DLRI is based on the controlled in situ synthesis of NPs from the decomposition of suitable organometallic precursors in conditions that are compatible with a pulsed injection mode of an aerosol into a downstream process. Coupled with low-pressure plasma, DLRI produces nanocomposite with homogeneously well-dispersed small nanoparticles that in the particular case of ZnO-DLC nanocomposite exhibit unique properties. DLRI favorably compares with the direct liquid injection of ex situ formed NPs. The exothermic hydrolysis reaction of the organometallic precursor at the droplet-gas interface leads to the injection of small and highly dispersed NPs and, consequently, the deposition of fine and controlled distribution in the nanocomposite. The scope of DLRI nanosynthesis has been extended to several metal oxides such as zinc, tin, tungsten, and copper to generalize the concept. Hence, DLRI is an attractive method to synthesize, inject, and deposit nanoparticles and meets the prevention and atom economy requirements of green chemistry.

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Section: Resultsmentioning

confidence: 99%

“…The reported analogous synthesis of ZnO NPs are classically prepared in batch processes in solution using Schlenk tube glassware, [ 60 , 61 ] needing at least one equiv. of DDA to achieve the colloidal stabilization in THF solution.…”

Section: Resultsmentioning

confidence: 99%

Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

et al. 2022

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“…There exists a true dynamic of the alkylamine chemisorbed on the surface of metal oxide. It has been shown for instance that primary alkylamines chemisorbed on ZnO are rather immobile while secondary alkylamine can diffuse on the surface . The systematic oxidation of intercalated TMDs in air has been poorly studied, even less the impact of the oxidation on their properties.…”

Section: Introductionmentioning

confidence: 99%

Effect of Oxygen Poisoning on the Bidirectional Hydrogen Electrocatalysis in TaS₂ Nanosheets

Shiraz

Khan

Péré³

et al. 2023

J. Phys. Chem. C

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Sustainable production of hydrogen gas, a green energy carrier of high density, is possible only by electrolysis of water based on the hydrogen evolution reaction (HER). Here, we report the effect of oxygen poisoning on the efficiency of hydrogen production and the consumption by the HER and the hydrogen oxidation reaction (HOR), respectively, on the interface of platinum group metal-free electrocatalyst TaS2 in pristine form and intercalated by the organic Lewis base hexylamine. The state of the surface probed by photoelectron spectroscopy was significantly altered by both Lewis base doping and oxygen poisoning. This alteration dramatically affects the hydrogen production efficiency in the HER, while the back process by the HOR was less sensitive to the changes in the surface states of the electrocatalysts. The oxygenated and intercalated electrocatalyst shows more than 2 × 105 times lower exchange current density of the HER compared to pristine oxygenated materials.

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“…We introduce herein a novel high-resolution DNP-SENS experiment for quadrupolar nuclei, which combines D -RINEPT and MQMAS techniques. This novel method is demonstrated to observe 17 O, 27 Al and 11 B nuclei near surfaces and it allows gaining new insights into the atomic-level structure of oxide nanoparticles used for optoelectronics and heterogeneous catalysis, including γ-alumina, − ZnO nanocrystals, − and partially oxidized boron nitride supported on dendritic and fibrous nanosilica (BN-B 2 O 3 /DFNS) …”

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confidence: 99%

Probing the Surface of Oxide Nanoparticles Using DNP-Enhanced High-Resolution NMR of Quadrupolar Nuclei

Nagashima,

Maleki,

Trébosc

et al. 2024

J. Phys. Chem. Lett.

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The surfaces of nanomaterials with applications in optoelectronics and catalysis control their physicochemical properties. NMR spectroscopy, enhanced by dynamic nuclear polarization (DNP), is a powerful approach to probe the local environment of spin-1/2 nuclei near surfaces. However, this technique often lacks robustness and resolution for half-integer quadrupolar nuclei, which represent more than 66% of the NMR-active isotopes. A novel pulse sequence is introduced here to circumvent these issues. This method is applied to observe with high-resolution 27 Al and 17 O spin-5/2 nuclei on the surface of γ-alumina. Moreover, we report high-resolution 17 O spectra of ZnO nanoparticles used in optoelectronics. Their assignment using DFT calculations allows the first NMR observation of vacancies near the surfaces. Finally, we employ the introduced NMR technique to observe 11 B spin-3/2 nuclei on the surface of partially oxidized boron nitride supported on silica and to distinguish its different BO 2 OH active sites.

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Anisotropic growth of ZnO nanoparticles driven by the structure of amine surfactants: the role of surface dynamics in nanocrystal growth

Abstract: Herein, we elucidate the key role of amine surfactants on the controlled anisotropic growth of ZnO nanoparticles that is achieved under mild conditions by organometallics hydrolysis. The structuring influence of...

Cited by 6 publications

References 98 publications

Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

Effect of Oxygen Poisoning on the Bidirectional Hydrogen Electrocatalysis in TaS₂ Nanosheets

Probing the Surface of Oxide Nanoparticles Using DNP-Enhanced High-Resolution NMR of Quadrupolar Nuclei

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Anisotropic growth of ZnO nanoparticles driven by the structure of amine surfactants: the role of surface dynamics in nanocrystal growth

Abstract: Herein, we elucidate the key role of amine surfactants on the controlled anisotropic growth of ZnO nanoparticles that is achieved under mild conditions by organometallics hydrolysis. The structuring influence of...

Cited by 6 publications

References 98 publications

Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

Secured Nanosynthesis–Deposition Aerosol Process for Composite Thin Films Incorporating Highly Dispersed Nanoparticles

Effect of Oxygen Poisoning on the Bidirectional Hydrogen Electrocatalysis in TaS2 Nanosheets

Probing the Surface of Oxide Nanoparticles Using DNP-Enhanced High-Resolution NMR of Quadrupolar Nuclei

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Effect of Oxygen Poisoning on the Bidirectional Hydrogen Electrocatalysis in TaS₂ Nanosheets